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Table 1 Unadjusted assessment of oral hygiene variables association with prevalence of dental caries

From: Reliability of self-reported toothbrushing frequency as an indicator for the assessment of oral hygiene in epidemiological research on caries in adolescents: a cross-sectional study

Variables DMFT
Mean Std. Deviation Median Range pvalue
Gender      
 Male 2.24 2.15 2.00 0-10 0.289*
 Female 2.46 2.41 2.00 0-15
Mother’s level of education      
 Up to 8 yrs 2.46 2.33 2.00 0-15 0.214*
 More than 8 yrs 2.30 2.30 2.00 0-12
Household Income     
 ≤2 BMW 2.83 2.58 2.00 0-15 0.002**
 2< income ≤ 3 BMW 1.99 1.98 2.00 0-8
 > 3BMW 2.06 2.70 2.00 0-12
Frequency of toothbrushing      
 ≤ twice a day 3.29 2.37 3.00 0-15 <0.001*
 More than twice a day 1.14 1.54 0.00 0-7
No. of sugary foods consumed daily      
 7 or more 2.75 2.42 2.00 0-15 0.005**
 4-6 2.37 2.34 2.00 0-12
 0-3 1.96 2.08 1.00 0-9
Mutans streptococci      
 ≥ 105UFC/mL 2.61 2.39 2.00 0-15 <0.001*
 < 105UFC/mL 1.80 2.01 1.00 0-10
Lactobacilli      
 ≥ 105UFC/mL 3.51 2.10 3.00 0-9 <0.001*
 < 105UFC/mL 2.28 2.30 2.00 0-15
Simplified Oral Hygiene Index      
 Unsatisfactory 2.80 2.44 2.00 0-15 <0.001*
 Satisfactory 1.97 2.11 1.00 0-9
Visible Plaque Index      
 Present 2.79 2.41 2.00 0-15 <0.001*
 Absent 1.75 2.02 1.00 0-9
  1. *Significance evaluated by Mann–Whitney test. **Significance evaluated by Kruskal-Wallis test. Results significant at the 5% level marked in bold. BMW: Brazilian Minimum Wage (about US$ 290.47 during the period of data gathering).